BSC 1011 Lecture Notes - Lecture 24: Sympatric Speciation, Allopatric Speciation, Punctuated Equilibrium
Document Summary
Chapter 24 the origin of species: define/describe, compare, and contrast, and provide examples for the biological, ecological, and. Additionally explain how gene flow plays a role or lack of a role in each concept: biological species: population of species that produce reproductively viable offspring with each other but not with any other species, reproductive isolation. If gene flow exists, this concept cannot distinguish two species: ecological species: two species maintain different ecological niches and/ or behavior, and/ or morphology yet occasionally interbreed (gene flow) to produce viable offspring. Example- reduced hybrid viability and fertility: 3. Describe the effects that sexual selection and habitat differentiation can have on speciation. Find additional examples online and explain how each support the concept of each type of speciation: allopatric speciation results from geographic barriers and isolation, such as when the level in a lake drops and two separate lakes form. Alloploidy: polyploidy with chromosomes derived from different species.
